Shut-off valve device for gas pipes and nozzles.



No. 678792. Pat ented July as, 190i.

' P. N. LUCAS GIRABDVILLE. SHUT-OFF VALVE DEVICE FOR GAS PIPES ANDmozzuzs'.

' (A li atimi filed Apr. 22, 1901. (No Model.)

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PAUL NICOLAS LUCAS GIRARDVILLE, OF PARIS, FRANCE.

SHUT-OFF VALVE DEVICE FOR GAS PIPES AND NOZZLES.

EQREGIEIGAEION forming part of Letters Patent No. 678,792, dated July16, 1901. Application filed April 22, 1901. Serial No. 56,877. (Nomodel.)

To ctZZ whom it 772mg, concern:

Be it known that 1, PAUL NIooLAs LUCAS GIRARDVILLE, a citizen of theRepublic of France, residing in the city of Paris, France, have inventeda newand useful Improvement in Shnt-0tf Valve Devices for Gas Pipes andNozzles, of which the following is a specification.

This invention relates to an improved constrnction of shut-off valveapplicable to all kinds of gas pipes and nozzles.

It consists in the combination of a cylindrical cap having anexternally-coned orifice, an inner screw-thread adapted to screw ontothe thread of a gas pipe or nozzle, and an external screw-thread, asecond cylindrical cap with internal screw-thread adapted to screw ontothe outer thread of the first cap, a threaded opening at its upper end,the closed inner end of which has a recess on its under side filled withsoft metal adapted to press upon and close the coned orifice of thefirst cap, and oblique passages adapted to allow the gas issuing fromthe coned orifice of the first cap to escape through the threadedopening of the second cap.

In order that the said invention may be readily understood, I willdescribe the same with reference to the accompanying draw ing, whichshows a vertical section of the improved shutoff valve device to anexaggerated scale.

1 is the threaded pipe or nozzle, such as is usual in any gaselier,bracket, or other illuminating device for the reception of the burner.Upon the thread of this piece is screwed an internally-threaded cap 2,the upper end of which is formed conical and has a central longitudinalorifice 3, while the lower end has an external flange 4, provided with aprojection 5 for facilitating the screwing on thereof on the pipe 1. 0nthe outer surface of the cap 2 is formed a screw-thread in which areformed annular grooves or gaps 6 and 7, for a purpose to be presentlymentioned. On the cap 2 is screwed a second cylindrical cap 8, near theupper end of which is a partition containing a recess 9, which is filledwith soft metal, such as solder, which serves as valve for closing theorifice 3 of the cap 2. On opposite sides of the recess 9 are obliquepassages 10 for conveying the gas from the orifice 3 when the valve isopen into the internally-threaded opening 11 at the upper end of cap 8,into which is screwed the burner or nipple of the gas-jet. The uppergroove 6 is filled with grease that may be made semifluid by mixingtherewith a small quantity of Vaseline or the like, thereby forming aclose joint and also acting as a lubricant for enabling the upper cap toturn readily on the lower one. The lower groove 7, on the other hand, isfilled with a packing of stiff grease or other suitable substance, suchas red lead, that will prevent the leakage past it of any of thesemiliquid grease from groove 6.

For shutting off the gas supply to the burner the cap 8 is turned uponthe cap 2 so as to bring the soft-metal valve 9 close down upon theconical orifice 3 and to thus cut off the supply of gas to the channels10.

The turning of cap 8 can be facilitated by providing it with a handle-orstud, such as 12, which at the same time serves as an index to show byits relative position whether the valve is open or closed.

In consequence of the continued pressure of the soft-metal valve 9 uponthe conical orifice .there will after a time take place a displacementof the soft metal, with the result that by degrees the handle 12 willshift from its initial relative position which indi cates the completeclosure of the valve, and consequently its other positions will also nolonger indicate the same degrees of opening of the valve. In order toremedy this inconvenience, it suffices to screw the two caps 2 and 8 alittle higher up on the pipe 1, so that by this slight turning motionthe handle 12 will be brought back to its initial position relative tothe other parts. It is requisite in this case to prevent any leakage ofgas that might occur between the screw-threads of the parts 1 and 2, andfor this purpose I provide on the pipe 1 a separate internally-threadedcollar 13, screwed onto the thread of pipe 1 and provided with a lug 14for conveniently turning it upon the pipe, which collar is screwed uptight against the base 4 of cap 2 with the interposition of a suitablegas-tight packing material, such as red lead.

Having thus described the nature of this invention and the bestmeanslknow of carry ing the same into practical effect, I claim-- Ashut-off valve device for gas pipes, nozzles and the like consisting ofthe combination of a cylindrical cap having an externallyconed orifice,an inner screw-thread adapted to screw onto the external thread of agassupply pipe or nozzle and an external screwthread, a secondcylindrical cap with internal screw-thread at its lower part adapted toscrew onto the external thread of the first cap, an internally-threadedopening at its upper part the closed inner end of which has on its underside a recess filled with soft metal and constituting a valve closingthe coned orifice of the first cap, and oblique passages on each side ofsaid valve adapted to conduct the gas issuing from the said conedorifice when open, into the threaded opening at top for the supply ofthe burner substantially as described.

In testimony that I claim the foregoing as my invention 1 have signed myname in presence of two subscribing witnesses.

PAUL NICOLAS LUCAS GIRARDVILLE.

Witnesses:

EDWARD P. MACLEAN, ,JULES FAYOLLET.

